code: def valid_environment_config():
      return {
          "var1": "value1",
          "var2": "value2",
      }
  
imports: from __future__ import absolute_import
  import os
  import pytest
  from mock import MagicMock
label_desc: Use image node_id 7 for calling a global function with example usage: valid_environment_config() and returns: dict